Rotenburg Castle, Château in Rotenburg an der Fulda, Germany

Rotenburg Castle is a château on the left bank of the Fulda in Rotenburg an der Fulda, Hesse, built from 1571 as a two-storey Renaissance four-wing complex with stair towers at all four corners. Only the south wing and the Marstall survive; the east wing, which held a chapel, was demolished around 1790. The inner courtyard opens east toward the palace park.

Landgrave Ludwig II of Lower Hesse had the first fortified castle built on the left bank of the Fulda in 1470; a town fire destroyed it in 1478, and a stone castle replaced it. From 1571 to 1607 Landgrave Wilhelm IV of Hesse-Kassel and his son Moritz built a two-storey Renaissance four-wing complex with corner stair towers, of which the south wing and the Marstall survive. From 1627 to 1834 it was the residence of the Hesse-Rotenburg line, and in 1750 and 1790 the west and north wings were rebuilt in Baroque and Empire style.

From 1627 to 1834 the castle was the residence of the Hessen-Rotenburg branch line, which ruled the so-called Rotenburger Quart. The name Rotenburg is tied to this princely court, and the former Marstall in front of the castle now houses the training centre of Hessen Mobil, the state road authority.

Schloss Rotenburg stands on the left bank of the Fulda in the town centre, so it is reached on foot rather than by a climb. The complex today consists of three wings around a courtyard that opens east toward the Schlosspark; the Marstall and other former service buildings stand in front of the castle. The Marstall now houses the training centre of Hessen Mobil, and the castle wings are used by the state finance school, so visitors see the grounds and exterior rather than furnished rooms.

The castle's east wing, demolished around 1790, held a chapel built as a transverse church. Several Hessian court artists worked on the complex, among them Caspar van der Borcht and Wilhelm Vernuken. Matthäus Merian recorded the Renaissance building in a 1646 copper engraving.